The biggest design feats of COVID-19 are medical devices that can be Frankensteined together with the parts that are available—not necessarily the parts you want. We thought that talk of ventilator shortages was done in the U.S., that we’d powered through peak demand from COVID-19 patients with some clever hacks. Now in places like Houston, where COVID-19 is spiking while hospitals reach capacity, that might not be the case.